fishy sounding message supposedly from ESET

Thank you for ESET SS.
I am running what I think is the latest official version 5.0.95.0.
I just received this email which I am questioning here. I have done
nothing that the email requests so far. Will wait till I hear what
the verdict is here.
Here are the goodies I got:
Complimentary upgradeemail@responses.esetprotects.com